[mapguide-users] Preliminary MrSID and ECW Support

Frank Warmerdam warmerdam at pobox.com
Tue Jan 30 12:32:32 EST 2007

Jose Manuel C G wrote:
> Well, I think the .ecw repositories files is not valid, and I need to create
> a new Data and Layer calling the .ecw outside the repositories. 


I don't know what you mean about "ecw repositories files".

> Anyway the plugin works fine on the spanish OS version too.
> Great work! congratulation :)
> Note: Would you like to publish in the wiki page of the proyect a tutorial
> to compile the sources and generate the necesary .dlls?

Frankly it turned out to be somewhat of a nightmare - partly because FDO 3.2.x
is still using GDAL 1.3.1.  I had to write custom makefiles for the GDAL
gdal/frmts/ecw and gdal/frmts/mrsid directories, backport the GDAL 1.4.0 mrsid
driver, and modify how parts of the GDAL core gets built so some extra internal
interfaces are exposed.  Some of this was already resolved in GDAL 1.4.0 so
once we upgrade to that things should be easier.

So, no, I'm not keen on documenting it.  It would actually be somewhat easier
to just go into the thirdparty\GDAL directory and modify the nmake.opt
to enable mrsid and ecw directly inside the GDAL build.  This is the normal
way this is handled, and the documention in the nmake.opt is basically all I
normally offer to GDAL developers.

Best regards,
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | President OSGeo, http://osgeo.org

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